Abstract
Polycarbonate (PC) has been increasingly used as plastic glass of rolling stock. PC has some advantages for lightweight and high impact strength as compared to inorganic glass. However, the long-term stability of PC through the service life of rolling stock was not fully examined. The authors analyzed the degradation behavior of PC glass under artifi cial weathering condition. The PC became yellowish through artifi cial weathering; however, the mechanical strengths, for example the fl exural strength and the impact strength, were suffi cient for actual window glass of rolling stock. In addition the degradation of plastic glass was also evaluated by means of color measurement.
